How much is the Iran war costing taxpayers? Here's what estimates show

According to an estimate the Pentagon shared with Congress, the U.S. used up billions of dollars in munitions in the first two days of the war.

The first six days of war in Iran cost U.S. taxpayers at least $8 billion, according to Pentagon estimates reviewed by lawmakers, and experts say the ongoing cost could increase exponentially.

The military used about $5.6 billion in munitions in the first two days of the conflict, according to a person with knowledge of the estimate. The munitions cost was first reported by the Washington Post.

The money spent on munitions, and the added expense of any damage done to U.S. military infrastructure by Iran's retaliatory attacks on U.S. bases, aren't factored into the Pentagon's yearly trillion-dollar budget. Given this deficit, President Donald Trump could ask Congress for more money to fund the war, but no such request has been submitted as yet.

The United States and Israel launched joint attacks on Iran on Feb. 28, bringing to an abrupt end at least a year of negotiations between the Trump administration and the country over its nuclear program. Since then, U.S. and Israeli forces have killed many of Iran's top political and military leaders and launched a bombing campaign that has killed more than 1,200 Iranians. Iran launched retaliatory attacks on U.S. bases and allies in the region that have killed seven U.S. servicemembers and wounded at least 140.

Trump officials have refused to lay out a definitive timeline for the war. Trump told reporters on March 9 that it is "very complete" and will wrap up "very soon," without elaborating on when it would end.